The next generation in 2XU Compression technology is here! MCS Muscle Containment Stamping is a revolutionary fabric support system traced over key muscle, tendon and fascia groups to focus greater targeted compression power to wrap precise areas and reduce muscle oscillation and damage. Features Flatlock seams to reduce chafing Powerful Invista Lycra for fit, support and recovery High filament yarns for moisture wicking Antibacterial and UPF 50 sun protection Targets calf muscles and offers